1. An Example Idea of FIA Authors: Date: 2010-05-20 May 2010 Name Company
2018/11/16
May 2010
An Example Idea of FIA
Authors:
Date:
Name
Company
Address
Phone
Hitoshi MORIOKA
ROOT Inc.
#33 Ito Bldg Tenjin, Chuo-ku, Fukuoka JAPAN
Hiroshi MANO
8F TOC2 Bldg Nishi-Gotanda, Shinagawa-ku, Tokyo JAPAN
Paul A Lambert
Marvell
Marvel lane, MS 2-201
Santa Clara, CA 95054
Marc Emmelmann
TU Berlin
Einsteinufer 25
10587 Berlin
Germany
24580
Hiroki Nakano
Trans New Technology
Sumitomo-Seimei Kyoto Bldg. 8F,
62 Tukiboko-cho Shimogyo-ku,
Kyoto JAPAN
Mineo Takai
Space Time Engineering
609 Deep Valley Drive, Suite 200　Rolling Hills Estates, CA 90274, USA
Hitoshi Morioka, ROOT INC.
Hiroshi Mano, ROOT Inc.

2. Use Case Scenario Walk May 2010
2018/11/16
May 2010
Use Case Scenario
Large number of STAs are constantly entering and exiting the coverage area of an ESS.
Every STA passes through the coverage area in a short time.
So FIA intends to
Reduce network connection latency
Reduce air-time occupancy of initial authentication
Walk
Hitoshi Morioka, ROOT INC.
Hiroshi Mano, ROOT Inc.

3. Sequence of Establishing Connection
May 2010
Sequence of Establishing Connection
Discover an appropriate AP
Channel Scanning, Probe, IEEE u…
WLAN association
Authentication, Association…
Upper layer setup
DHCP…
Hitoshi Morioka, ROOT INC.

4. November 2005
doc.: IEEE /1859r0
May 2010
Protocol Sequence to Establish a Connection to the Internet by IEEE802.11i ( PEAP/EAP-MSCHAPv2) and DHCP
STA AP
14 round trip
2ms/oneway: 56ms
RADIUS
Probe
Authentication
11 round trip
5ms/oneway: 110ms
Association
PEAP
/EAP-MSCAPv2
(11 round trip)
Details are out of scope.
We’ll make only a
Framework and liaison
to IETF
DHCP
(2 round trip)
DHCP Server
Hitoshi Morioka, ROOT INC.
Page 4
Hitoshi MORIOKA, ROOT Inc.

5. How to reduce connection latency and air-time occupancy
May 2010
How to reduce connection latency and air-time occupancy
Transmit Rate
1Mbps (DSSS)
6Mbps (OFDM)
DIFS
50us
34us
CW Min
620us
(ave. 310us)
135us
(ave. 67us)
CW Max
20,460us
9,207us
Preamble Length
144us
16us
PLCP Header
48us
4us
MAC Header
256us
43us
FCS
32us
5us
SIFS
10us
Ack
304us
39us
Overhead
1,154us
224us
Data (100byte)
800us
133us
Reducing number of frame exchanges is effective. Because…
Length of each frame for association is short. (mostly < 100byte)
Overhead (Preamble, IFS, Header, ACK, etc…) is needed for every frame.
Preamble
FCS CW
Ack
Data
DIFS
SIFS
PLCP Header
MAC Header
Hitoshi Morioka, ROOT INC.

6. Protocol Sequence to Establish a Connection to the Internet by FIA
May 2010
Protocol Sequence to Establish a Connection to the Internet by FIA
STA AP
1.5 round trip
2ms/oneway: 6ms
Beacon
GAS Server
GAS
FIA
2 round trip
5ms/oneway: 20ms
RADIUS
Connection established
(Includes some parts of
upper layer setup such as
IP address, gateway, DNS…)
Hitoshi Morioka, ROOT INC.

7. How to reduce the number of frame exchanges in AP discovery
May 2010
How to reduce the number of frame exchanges in AP discovery
Restricting to transmit probe.
Beacon includes FIA Capability bit to indicate.
Some amendments to .11u may be needed for reducing GAS transmission. Such as…
AP should transmit GAS response as broadcast to notify the information to other STAs too.
STAs, which received broadcasted GAS response and the information included in the GAS response is enough, should not transmit GAS request to the same AP.
Hitoshi Morioka, ROOT INC.

8. Questions & Comments May 2010 2018/11/16 Hitoshi Morioka, ROOT INC.
Hiroshi Mano, ROOT Inc.